McDonald's is obviously the king of soft serve, and they are making this National Ice Cream Day even sweeter with the Golden Arches promotion. Here's everything you need to know about the contest that could get you free ice cream for the rest of your life.

The Shining Golden Arches Cone

Between 2-5 pm on Sunday, one customer that orders a Vanilla soft serve cone will be given the "Golden Arches Cone," which grants that lucky individual free soft serve FOR LIFE.

It's also no risk to enter this challenge, because if you order the cone on the McDonald's mobile app (downloading it now), it's free on National Ice Cream Day. So, basically you're getting free ice cream in the hopes that it'll get you more free ice cream. This is almost too good to be true, but it's real.

So basically, there is no excuse to not eat this soft-serve. If you want free ice cream, head over to McDonald's on Sunday for National Ice Cream Day. Best case scenario — that McDonald's Soft Serve will be free for the rest of your freaking life.